GED Science Practice: Life Science
GED Testing Service says about 40 percent of the Science test is life science. Practice body systems, ecosystems, genetics and evolution questions, including tables and experiments, with an explanation for every answer.
35 questions in 88 minutes, the real test’s question time, split by GED Testing Service’s content shares and scored by area with an explanation for every answer. 14 of the questions are Life Science.
Or try the free Life Science drill- 40 original Life Science questions, each answer explained
- About 40% of the GED Science test
- 3 topic drills, ten questions each
Which two body systems work together most directly to deliver oxygen to muscle cells?
What Life Science covers
- Human body and health (L.a–L.b): body systems, homeostasis, nutrition, disease transmission, and energy from respiration and fermentation.
- Ecosystems (L.c): food chains and webs, energy pyramids, carrying capacity, symbiosis, predator and prey, and disruption of ecosystems.
- Cells, heredity and evolution (L.d–L.f): cell theory, mitosis and meiosis, DNA, Punnett squares and pedigrees, mutation, natural selection and common ancestry.
Codes are GED Testing Service’s assessment targets and content topics from its Assessment Guide for Educators; the topic groupings and summaries are ours.
Life Science practice by topic
- Human body and health
Body systems, homeostasis, nutrition, disease transmission, and energy from respiration and fermentation. 13 questions.
Free human body and health drill - Ecosystems
Food chains and webs, energy pyramids, carrying capacity, symbiosis, predator and prey, and disruption of ecosystems. 12 questions.
Free ecosystems drill - Cells, genetics and evolution
Cell theory, mitosis and meiosis, DNA, Punnett squares and pedigrees, mutation, natural selection and common ancestry. 15 questions.
Free cells, genetics and evolution drill
Free Life Science drill (ten questions across its topics)
14 Life Science questions in a full timed exam
35 questions in 88 minutes, the real test’s question time, split by GED Testing Service’s content shares and scored by area with an explanation for every answer. 14 of the questions are Life Science.
Or try the free Life Science drillCommon questions
How much of the GED science test is biology?
About 40 percent is life science, according to GED Testing Service’s Assessment Guide for Educators. Another 40 percent is physical science and 20 percent is Earth and space science.
Do I need to know Punnett squares for the GED?
Yes. The content topics include genotypes, phenotypes and the probability of traits, with Punnett squares and pedigree charts named as examples.
35 questions in 88 minutes, the real test’s question time, split by GED Testing Service’s content shares and scored by area with an explanation for every answer. 14 of the questions are Life Science.
Or try the free Life Science drillMore GED Science practice
Content areas and shares checked November 2026: Assessment Guide for Educators: Science · GED Testing Service: Science test.
Original independent practice. Every question is written for practice from GED Testing Service’s published assessment targets; none are GED test questions. Not affiliated with or endorsed by GED Testing Service or the American Council on Education. GED® and GED Ready® are registered trademarks of the American Council on Education, administered by GED Testing Service under license.